MILTON — A man is dead after a head-on collision involving a motorcycle Monday afternoon.

James Harris, 74, of Fort McCoy, Florida, was driving south on Ward Basin Road near Casa Grande Drive around 4:46 p.m. on a Yamaha YJ125 motorcycle. Terry Nance, 42, of Milton was driving a Peterbilt 579 semi truck in the northbound lane, according to a crash report from Florida Highway Patrol.

Harris crossed over into the opposite lane and hit Nance head-on. Harris died at the scene, the report said.

Harris was not wearing a helmet. Alcohol is not thought to be a factor in the crash, according to the report. The crash is still under investigation.